Atomic oxygen effects on polymer-based materials
1991; NRC Research Press; Volume: 69; Issue: 8-9 Linguagem: Inglês
10.1139/p91-180
ISSN1208-6045
Autores Tópico(s)Plasma Diagnostics and Applications
ResumoThis paper describes the operation and performance of an atomic-oxygen (AO) beam facility developed at the University of Toronto Institute for Aerospace Studies (UTIAS), capable of providing ground-state neutral oxygen atoms at ~ 2.2 eV for flux levels as high as ~ 10 16 atoms (cm 2 s) −1 . Results are presented on the AO erosion of polymer thin films and composite materials containing graphite and aramid fibres in epoxy matrices. Comparisons with space flight tests are also given, including studies of samples recently retrieved from the UTIAS composite-materials experiment on the NASA Long Duration Exposure Facility after 70 months exposure in low Earth orbit. Parameters that have been investigated include synergistic effects of UV radiation, surface-morphology changes, and accelerated testing.
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